diff options
Diffstat (limited to 'src/mesa/swrast/s_depth.c')
| -rw-r--r-- | src/mesa/swrast/s_depth.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/mesa/swrast/s_depth.c b/src/mesa/swrast/s_depth.c index 17e00dda4ff..393590c6734 100644 --- a/src/mesa/swrast/s_depth.c +++ b/src/mesa/swrast/s_depth.c @@ -25,6 +25,7 @@ #include "main/glheader.h" #include "main/context.h" +#include "main/formats.h" #include "main/macros.h" #include "main/imports.h" #include "main/fbobject.h" @@ -1299,12 +1300,16 @@ void _swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb, GLint n, GLint x, GLint y, GLuint depth[] ) { + GLuint depthBits; + if (!rb) { /* really only doing this to prevent FP exceptions later */ _mesa_bzero(depth, n * sizeof(GLuint)); return; } + depthBits = _mesa_get_format_bits(rb->Format, GL_DEPTH_BITS); + ASSERT(rb->_BaseFormat == GL_DEPTH_COMPONENT); if (y < 0 || y >= (GLint) rb->Height || @@ -1336,8 +1341,8 @@ _swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb, if (rb->DataType == GL_UNSIGNED_INT) { rb->GetRow(ctx, rb, n, x, y, depth); - if (rb->DepthBits < 32) { - GLuint shift = 32 - rb->DepthBits; + if (depthBits < 32) { + GLuint shift = 32 - depthBits; GLint i; for (i = 0; i < n; i++) { GLuint z = depth[i]; @@ -1349,14 +1354,14 @@ _swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb, GLushort temp[MAX_WIDTH]; GLint i; rb->GetRow(ctx, rb, n, x, y, temp); - if (rb->DepthBits == 16) { + if (depthBits == 16) { for (i = 0; i < n; i++) { GLuint z = temp[i]; depth[i] = (z << 16) | z; } } else { - GLuint shift = 16 - rb->DepthBits; + GLuint shift = 16 - depthBits; for (i = 0; i < n; i++) { GLuint z = temp[i]; depth[i] = (z << (shift + 16)) | (z << shift); /* XXX lsb bits? */ |